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Commitment and Contingencies - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Amount paid	$ 922
Payments required to maintain mineral rights	2,016
Performance bonds	8,388	$ 7,751
Undiscounted cash flows	$ 23,412	$ 23,529

X

- Definition

Asset Retirement Obligation, Performance Bonds, Restoration and Reclamation Obligations

+ References

No definition available.

+ Details

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Namespace Prefix:	encr_
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Balance Type:	credit
Period Type:	instant

X

- Definition

Asset Retirement Obligation, Undiscounted Cash Flows

+ References

No definition available.

+ Details

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Namespace Prefix:	encr_
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X

- Definition

Mineral Rights, Annual Maintenance Payments

+ References

No definition available.

+ Details

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Namespace Prefix:	encr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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X

- References

No definition available.

+ Details

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X

- Definition

Amount of loss contingency liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-1

Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-10

+ Details

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